Facecigar ecig uses only high quality, high-tech lithium-ion batteries. Depending on the kit these batteries typically last approximately around 300-500 puffs with normal use before they need to be charged. 

However with the Facecigar eGo series E-Cigarette kits, you are getting 2 batteries, so you can always have one charged, while using the other, and each battery can keep around 800-1200puffs at least when it is fully charged.